code: def parse_args():
      parser = argparse.ArgumentParser(description="")
      parser.add_argument(
          "--root_dir",
          type=str,
          help="The root dir of the result images generated by predict.py",
      )
      return parser.parse_args()
  
file_path: PaddleSeg/tools/data/cityscapes_trainid2labelid.py
imports: import argparse
  import os
  from collections import namedtuple
  import numpy
  from PIL import Image
  from tqdm import tqdm
  from paddleseg.utils import get_image_list
label_desc: Use image node_id 1 for calling a global function with example usage: parse_args() and returns: parser